Static file handling and rudimentary JSON handling

* Created static file handling.
* Shifted CSS to static file.
* Refactored HTTP to respect UI segregation a bit more
* Shifted a lot of HTML related stuff to HtmlUI - there's still more to be refactored though!
* Created HttpUI as base UI for HTTP request types
* Created basic JsonUI class that kind of works a bit but isn't reliable yet

Yay.